light Lexus GS300h 2017 Owner's Guide

701-1. For safe use
GS450h_300h_OM_OM30F92E_(EE) Push the buckle release button and fully
retract the seat belt.
Remove the head restraint if it inter-
feres with your child restraint system.
Widen the gap between the seat cushion and seatback slightly.
Latch the buckles onto the exclusive
fixing bars.
If the child restraint has a top strap, the
top strap should be latched onto the
anchor bracket.
Removing a child restraint installed with a seat belt
Installation with ISOFIX rigid anchor
1
2
3

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1-1. For safe use
1
GS450h_300h_OM_OM30F92E_(EE)
For safety and security
Exhaust gas precautions
Harmful substance to the human body is included in exhaust gases if inhaled.
WARNING
Exhaust gases include harmful carbon monoxide (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident
caused by light-headedness, or may lead to death or a serious health hazard.
■Important points while driving
●Keep the trunk lid closed.
●If you smell exhaust gases in the vehicle even when the trunk lid is closed, open the
windows and have the vehicle inspected at any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer as soon as possible.
■When parking
●If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop the
hybrid system.
●Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and ensure
that exhaust fumes do not enter the vehicle interior.
●Do not leave the hybrid system operating in an area with snow build-up, or where it is
snowing. If snowbanks build up around the vehicle while the hybrid system is operat-
ing, exhaust gases may collect and enter the vehicle.
■Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or crack caused
by corrosion, damage to a joint or abnormal exhaust noise, be sur e to have the vehicle
inspected and repaired by any authorized Le xus retailer or Lexus authorized repairer,
or any reliable repairer.

821-2. Hybrid system
GS450h_300h_OM_OM30F92E_(EE)
■If a warning light comes on, a warning message is displayed, or the 12-volt battery is dis-
connected
The hybrid system may not start. In this case, try to start the system again. If the “READY”
indicator does not come on, contact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
■Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started, refuel the
vehicle with at least enough gasoline to make the low fuel level warning light ( P. 462)
go off. If there is only a small amount of fuel, the hybrid sys tem may not be able to start.
(The standard amount of fuel is about 9.9 L [2 .6 gal., 2.2 Imp.gal.], when the vehicle is on
a level surface. This value may vary when the vehicle is on a slope. Add extra fuel when
the vehicle is inclined.)
■Electromagnetic waves
●High voltage parts and cables on hybrid ve hicles incorporate electromagnetic shield-
ing, and therefore emit approximately the same amount of electromagnetic waves as
conventional gasoline powered vehicles or home electronic appliances.
●Your vehicle may cause sound interference in some third party-produced radio parts.
■Hybrid battery (traction battery)
The hybrid battery (traction battery) has a lim ited service life. The lifespan of the hybrid
battery (traction battery) can change in accordance with driving style and driving condi-
tions.
■Declaration of conformity
This model conforms to hydrogen emissions according to regulation ECE100 (Battery
electric vehicle safety).
WARNING
■High voltage precautions
This vehicle has high voltage DC and AC systems as well as a 12-volt system. DC and
AC high voltage is very dangerous and can cause severe burns and electric shock that
may result in death or serious injury.
●Never touch, disassemble, remove or replace the high voltage parts, cables or their
connectors.
●The hybrid system will become hot after starting as the system uses high voltage. Be
careful of both the high voltage and the hi gh temperature, and always obey the warn-
ing labels attached to the vehicle.
●Never try to open the service plug access
hole located behind the rear seats. The ser-
vice plug is used only when the vehicle is ser-
viced and is subject to high voltage.

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1
1-3. Theft deterrent system
GS450h_300h_OM_OM30F92E_(EE)
For safety and security
Immobilizer system
The indicator light flashes after the
power switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the power switch has been turned to
ACCESSORY or ON mode to indi-
cate that the system has been canceled.
■System maintenance
The vehicle has a maintenance-free type immobilizer system.
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object
●If the key is in close proximity to or touching a key to the security system (key with a
built-in transponder chip) of another vehicle
The vehicle’s keys have built-in transpon der chips that prevent the hybrid sys-
tem from starting if a key has not been previously registered in the vehicle’s
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
This system is designed to help prev ent vehicle theft but does not guarantee
absolute security against all vehicle thefts.

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1
1-3. Theft deterrent system
GS450h_300h_OM_OM30F92E_(EE)
For safety and security
Alarm 
The alarm uses light and sound to give an
alert when an intrusion is detected.
The alarm is triggered in the following situations when the alarm is set: ● A locked door is unlocked or opened in any way other than using the entry
function or wireless remote control. (The door will lock again automatically.)
● A trunk is opened in any way other than using the entry function, wireless
remote control or mechanical key.
● The hood is opened.
● The tilt sensor detects a change of vehicle inclination. (if equipped)
Close the doors, trunk and hood, and
lock all the doors using the entry func-
tion or wireless remote control. The
system will be set automatically after
30 seconds. The indicator light changes from being
on to flashing when the system is set.
: If equipped
The alarm
Setting the alarm system

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2Instrument cluster
GS450h_300h_OM_OM30F92E_(EE) 2. Instrument cluster
Warning lights and indicators .............................. 98
Gauges and meters ................... 104
Multi-information display ........... 111
Head-up display ............................ 119
Energy monitor/ consumption screen ................126

982. Instrument cluster
GS450h_300h_OM_OM30F92E_(EE)
Warning lights and indicators
Except F SPORT models
F SPORT models
The units used on the speedometer may differ depending on the target region.
The warning lights and indicators on th e instrument cluster, center panel and
outside rear view mirrors inform the driv er of the status of the vehicle’s vari-
ous systems.
For the purpose of explanation, the foll owing illustration displays all warning
lights and indicators illuminated.

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2. Instrument cluster
2
Instrument cluster
GS450h_300h_OM_OM30F92E_(EE) Warning lights inform the driver of malfunctions in the indicated vehicle’s sys-
tems.
Warning lights
*
1
Brake system warning light ( P. 460) *
2, 3
(If equipped)
“AFS OFF” indicator (
 P. 462)
* 2, 4
Charging system warning
light (P. 460) *
1, 3
Brake hold operated
indicator (
P. 462)
* 2
Malfunction indicator
lamp ( P. 460) *
3
Parking brake indicator (
 P. 462)
* 2
SRS warning light ( P. 460) *
1
Brake system warning light (
 P. 462)
* 1
ABS warning light ( P. 461)
Low fuel level warning light ( P. 462)
* 2
Electric power steering
system warning light (
 P. 461)Seat belt reminder light ( P. 462)
* 2, 3
(If equipped)
PCS (Pre-Crash Safety
system) warning light (
 P. 461) *
2
Master warning light ( P. 462)
* 1
Slip indicator (
P. 461) *
2
(If equipped)
Tire pressure warning light (
 P. 463)
(If equipped)
LKA warning light ( P. 463)

1002. Instrument cluster
GS450h_300h_OM_OM30F92E_(EE) *
1
: These lights turn on when the power switch is turned to ON mo de to indicate that a
system check is being perfor med. They will turn off after the “READY” indicator turns
on. There may be a malfunction in a system if a light does not come on, or turn off.
Have the vehicle inspected by any author ized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
* 2
: These lights turn on when the power switch is turned to ON mo de to indicate that a
system check is being performed. They will turn off after the hybrid system is on, or
after a few seconds. There may be a malfunction in a system if a light does not come
on, or turn off. Have the vehicle inspected by any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
* 3
: The light flashes to indicate a malfunction.
* 4
:F SPORT models

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2. Instrument cluster
2
Instrument cluster
GS450h_300h_OM_OM30F92E_(EE) The indicators inform the driver of the operating state of the vehicle’s variou
s sys-
tems.
Indicators
Turn signal indicator (  P. 231) Rear fog light indicator(
 P. 250)
Tail light indicator (  P. 237) Cruise control indicator (
 P. 304, 308)
Headlight high beam
indicator ( P. 238)
(If equipped)
Dynamic radar cruise
control indicator ( P. 296)
(If equipped)
Automatic High Beam
indicator ( P. 246)/
Adaptive High-beam
System indicator (  P. 242) Cruise control “SET”
indicator (
P. 296, 308)
Front fog light indicator(  P. 250)
(If equipped)
LKA indicator ( P. 286)
* 1
(If equipped)
Lexus parking assist-sensor
indicator *
2
Brake hold operated
indicator ( P. 235)
* 3
(If equipped)
“AFS OFF” indicator(
 P. 239) *
3, 4“PASSENGER AIR
BAG” indicator (
 P. 54)
* 2, 5
Slip indicator ( P. 326) *
6
Low outside temperature
indicator (
P. 104)
* 2
VSC OFF indicator ( P. 327)
“READY” indicator ( P. 217)
* 3, 7
(If equipped)
PCS (Pre-Crash Safety
system) warning light (
 P. 273) EV indicator ( P. 78)